|Publication number||US4441252 A|
|Application number||US 06/390,278|
|Publication date||Apr 10, 1984|
|Filing date||Jun 21, 1982|
|Priority date||Jun 21, 1982|
|Publication number||06390278, 390278, US 4441252 A, US 4441252A, US-A-4441252, US4441252 A, US4441252A|
|Inventors||Thomas J. Caves|
|Original Assignee||Caves Thomas J|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (9), Classifications (8), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
This invention relates, generally, to non-motorized hair trimming devices and more specifically to a hair trimming device characterized by an integrally formed combination handle and yoking means that provides a means for retaining a conventional razor blade in sandwiched relation between a pair of complementally formed, releasably secured members that form a housing for such blade when the device is in use.
2. Description of the Prior Art
There are several non-motorized hair trimming devices that are known. Typically, however, blade changing requires the removal of a bolt and nut assembly so that the parts of the device that house the blade can be separated.
There is a need for a device that requires no nuts and bolts to hold it together. The earlier devices are also clumsy to handle, so there is a need for an easily handled hair trimming device as well.
The most similar earlier device to the invention to be disclosed hereinafter is shown in the inventor's co-pending disclosure filed June 1, 1981, bearing Ser. No. 6/268,836. Although the device disclosed therein provides many advantages over earlier devices, such device has some structural complexity which could result in higher manufacturing costs than the invention to be disclosed herein. Accordingly, there is a need for a hair trimming device of the utmost structural simplicity that is very economical to manufacture and that is elegant in its concept.
The longstanding but heretofore unfulfilled need for an elegant non-motorized hair trimming device having a structure of irreducible simplicity is now fulfilled in the form of a device having a bifurcated blade housing that is held together as a unit by a yoking means that is characterized by a pair of resilient arm members. The resiliency of the arms allows the blade housing unit to be removed and reinserted therefrom and thereinto, respectively, in the absence of nuts, bolts, or other mechanical securing means.
The yoking means is integrally formed with an elongate handle member, said yoking means provided in the form of a pair of substantially parallel, transversely spaced arm members, each of which has a recess formed therein on its inward facing surface. The blade housing means is provided in the form of a base plate member and a base plate capping member, both of which are generally flat and of rectangular configuration. The base plate and its capping means are provided with projecting ridges on their respective outward facing surfaces that engage the associated recesses formed in the inward facing surfaces of the yoking means arm members when such blade housing means is slideably disposed therebetween.
It is therefore seen that an important object of this invention is to provide a non-motorized hair trimming device that is easy to assemble and disassemble so that blade changing can be accomplished quickly and easily.
Another important object is to provide the needed device in an easily manufactured, and thus easily affordable, form.
The invention accordingly comprises the features of construction, combination of elements and arrangement of parts that will be exemplified in the construction hereinafter set forth, and the scope of the invention will be indicated in the claims.
For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description, taken in connection with the accompanying drawings, in which:
FIG. 1 is a top plan view of the preferred embodiment of the invention.
FIG. 2 is a transverse sectional view taken along line A--A of FIG. 1.
FIG. 3 is a longitudinal sectional view taken along line B--B of FIG. 1.
FIG. 4 is a side elevational view of the preferred embodiment of the invention.
Referring now to FIG. 1, there it will be seen that the preferred embodiment of the invention is designated 10 as a whole.
A conventional razor blade means is shown in such FIG. and is indicated by the reference numeral 12. The blade 12 is disposed in sandwiched relation to a base plate member 14 and a base plate capping member 16 (FIGS. 2-4). As is clear from the drawings, the base plate 14 and the capping member 16 are of substantially identical configuration, the difference lying in the provision of upstanding, longitudinally spaced peg members 18 formed in the base plate 14. The conventional blade 12 is manufactured with a symmetrical, longitudinally extending slot 19 formed therein, having a curvilinear perimeter as shown in FIG. 1. The curvilinear perimeter defines a pair of longitudinally spaced openings that synergistically define passageways through which the pegs 18 extend. The diameter of the pegs 18 is made just slightly less than the diameter of such openings so that the pegs 18 will extend therethrough and prevent lateral movement of the blade 12 when so extended. Thus, the pegs 18 serve to locate and align the blade 12 as well as to hold such blade 12 in position.
With the blade 12 in position on the base plate member 14, the base plate capping member 16 is snapped onto the pegs 18 by aligning such pegs with cooperatively positioned peg receiving apertures 20 formed in the capping member 18, each aperture 20 releasably receiving a different peg 18. This easy assembly provides a housing for the blade 12.
In FIGS. 1, 3 and 4 it will be seen that the housing unit formed of members 14, 16 is slideably retained between arms 22, 22 that are integrally formed with elongate handle member 24. The arms 22, 22 are formed of a resilient material and are provided with a recess individual to each arm, such recesses being designated 26 in FIG. 3. The recesses 26, 26 are aligned normal to the longitudinal axis of symmetry of the handle and snap fittingly mate with complementally formed and cooperatively positioned projecting ridge members 28 formed in the respective outermost surfaces of the housing members 14, 16. The ridges 28, 28 are formed in a square in section slot means 29, 29 (FIG. 2), such slot means provided to slidingly receive the arms 22, 22. As shown in FIG. 3, the arms 22 transiently diverge responsive to sliding introduction of the housing members 14, 16 into the space defined by the arms 22, 22-such divergence shown in phantom lines-and converge when ridges 28, 28 align with recesses 26, 26, thereby snapping the blade housing unit 14, 16 into place.
As shown in FIG. 1, the housing formed by members 14, 16 can be easily removed when the handle 24 is being gripped by simply pushing such housing to the left as the unit 10 is depicted in such Figure with the thumb and forefinger. The housing is also easily removed by simply grasping the housing where it extends from the yoking means defined by the arms 22, 22, and retracting the same. During the retraction process, the arms 22, 22 will of course transiently diverge due to the misalignment of ridges 28 and recesses 26, just as in the introduction process.
As shown in FIGS. 1, 3 and 4, an oval shaped material saving depression 30 is formed in the handle 24. The depression 30 also aids in the gripping of the device 10.
As is clearly shown in FIG. 1, and as is clear from an inspection of FIG. 2 as well, a plurality of transversely aligned cut away portions 32 are formed in the base plate and capping members 14, 16 to expose the cutting edges of the blade 12. Preferably, the cut away portions on one side of the housing are deeper than the opposing cut away portions so that hair can be trimmed to different lengths depending on the side of the device chosen.
The right angle relation between the blade housing 14, 16 and the handle 24 provides a device that is very easy to handle. The device can be made of high impact plastic in any color, and thus can be made very attractive to consumers at an affordable price. Blade changing is quick and easy, and the device works well.
It will thus be seen that the objects set forth above, and those made apparent by the preceding description, are efficiently attained and since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.
Now that the invention has been described,
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1083026 *||Oct 23, 1911||Dec 30, 1913||Johan Abraham Ohlsson||Safety-razor.|
|US2746144 *||Mar 23, 1953||May 22, 1956||Cutter Corp||Hair cutter|
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|US3165831 *||Mar 4, 1963||Jan 19, 1965||Carrol Dorothy A||Multiple comb and blade hair trimming device|
|US3183589 *||Jul 12, 1962||May 18, 1965||Zoltan Szabo||Blade comb hair trimmer having tooth structure permitting variable depth of cut|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4612705 *||Aug 1, 1984||Sep 23, 1986||Wilkinson Sword Limited||Open razor|
|US5479950 *||Oct 6, 1994||Jan 2, 1996||Andrews; Edward A.||Finger tip mustache shaving device with cover|
|US5673711 *||Aug 16, 1995||Oct 7, 1997||Andrews; Edward A.||Fingertip control mustache shaving device|
|US6058608 *||Aug 28, 1998||May 9, 2000||Wruck; Rickey A.||Line trimmer|
|US6249973||Nov 22, 1999||Jun 26, 2001||Tokyo Riki Co., Ltd.||Thinning razor|
|US6309398 *||Nov 1, 2000||Oct 30, 2001||Floerke Armin||Horny skin remover|
|US7322109 *||Jul 7, 2004||Jan 29, 2008||James C. Newkirk||Razor for buzz cutting head hair|
|US8539961||Aug 3, 2007||Sep 24, 2013||Donald Gaugler||Hair cutting comb with T-top member|
|US20060005394 *||Jul 7, 2004||Jan 12, 2006||Newkirk James C||Razor for buzz cutting head hair|
|U.S. Classification||30/30, 30/53|
|International Classification||B26B21/42, B26B21/12|
|Cooperative Classification||B26B21/42, B26B21/12|
|European Classification||B26B21/12, B26B21/42|
|Nov 10, 1987||REMI||Maintenance fee reminder mailed|
|Apr 10, 1988||LAPS||Lapse for failure to pay maintenance fees|
|Jun 28, 1988||FP||Expired due to failure to pay maintenance fee|
Effective date: 19880410
|Oct 1, 1990||AS||Assignment|
Owner name: CAVES, THOMAS J., JR., MICHIGAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FIRST NATIONAL BANK OF CLEARWATER N.A., THE PERSONAL REPRESENTATIVE OF THE ESTATE OF THOMAS J. CAVES, DEC D;REEL/FRAME:005461/0621
Effective date: 19900424